Industrial Electric Motors

What are the two major components of an electric motor?

• Stator and Rotor
• Rotor and Inductor
• Stator and Transformer
• Stator and Capacitor

What are the opposite ends of coil windings U1, V1, and W1?

• U2, V2, W2
• U2, V1, W1
• U3, V3, W3
• U1, V1, W1

If a motor has a rated speed of 1774 rpm, how many poles does it have?

• 4
• 8
• 6
• 2

Which NEMA design motor would be best for a fan or pump application?

• NEMA Design D motor
• NEMA Design C motor
• NEMA Design A motor
• NEMA Design B motor

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

What is a megger used for on an induction motor?

• To measure voltage levels in the motor.
• To check the temperature of the motor windings.
• To assess the mechanical alignment of the motor.
• To measure insulation resistance of the windings in an induction motor.

If a motor has a service factor of 1.5, what does this mean?

• The motor can only handle its rated capacity.
• The motor is designed for continuous operation at 1.5 times its rated speed.
• The motor has a lifespan of 1.5 years.
• The motor can handle 1.5 times its rated capacity or 150%

Three-phase power is connected to the rotor on an induction motor. True or false?

• True
• False

The rotor speed is the same as the rotating magnetic field speed of the stator in an induction motor. Ture or False?

• True
• False

Spinning the shaft by hand is a good example of a motor check PM. True or False?

• True

• False

Tags

NGSS.HS-PS3-3

what does an encoder do for a motor?

• An encoder controls the motor's temperature.
• An encoder increases the motor's power output.
• An encoder provides feedback on the motor's position and speed.
• An encoder is used to start and stop the motor.

Tags

NGSS.HS-PS2-5